The speech not-Locke made in the numbers cave was another clincher to my theory: there is no anything, it's all a big story made up by these two to give lost souls a chance to 'prove' whether they deserve a peaceful or tormented existence after death. The island is a form of purgatory. Everyone on the island has died at some point. What I'm conflicted about is whether or not the smoke monster that did damage last night is 'Evil smoke monster' or 'Good smoke monster'. I dunno, maybe I have flipped the script wrongly, but I still maintain that this is a version of the age-old God vs Satan "I bet I can find good souls/I bet you can't" wager story of the bible. This episode reaffirmed some of that, but also got me thinking 'what if I have it backwards'
What if Jacob is Evil and Locke/MIB is good? What if the smoke monster came to the temple to cleanse out false worshippers (see: the bible, all the way thru lol).
All I know is, it better be something close to what I'm thinking, or some sort of scientific experiment, or this is gonna be the biggest failure of a close to a series in network television history.